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Golf ball

a technology for golf balls and balls, applied in the field of golf balls, can solve the problems of difficult molding of thin covers, cosmetic problems, and difficult centering, and achieve the effects of favorable combination of spin, resiliency and durability characteristics, and improved production efficiency

Inactive Publication Date: 2005-03-29
TOPGOLF CALLAWAY BRANDS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a golf ball with deep dimples that have different radii and extend into the inner layer or core of the ball. The dimples have a first region with a first radius and a first span, and a second region with a second radius and a second span. The golf ball also has a cover layer with one or more deep dimples that have multiple radii and favorable playability properties. The cover layer is thinner than traditional cover layers. The invention provides a cost-effective and efficient way to manufacture golf balls with improved playability properties.

Problems solved by technology

However, due to equipment limitations, it is often very difficult to mold a thin cover.
The pins sometimes produce centering difficulties and cosmetic problems (i.e. pin flash, pin marks, etc.) during retraction, which in turn require additional handling to produce a golf ball suitable for use and sale.
Additionally, the lower the viscosity of the mantle and / or cover materials, the greater the tendency for the retractable pins to stick due to material accumulation, making it necessary to shut down and clean the molds routinely.

Method used

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Examples

Experimental program
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Effect test

examples

Golf balls according to the present invention were produced. The golf balls had a core, a mantle or inner cover layer, and an outer cover layer. The mantle was an ionomer, and the outer cover was a polyurethane cover formed by a RIM process (Ball Type A). The mold used had 6 support pins (3 in each hemisphere), which formed deep dimples in each hemisphere, located in a triangular arrangement similar to that shown in FIG. 9. The balls were tested against other balls, as described below. The results are shown in Tables 3 to 5 below.

Ball Type B was a ball having a dual core, an ionomer mantle and an injection molded polyurethane cover. Ball Type C was a ball having a single core, an ionomer mantle and an ionomer cover. Ball Type D was a commercial grade Strata® Tour Professional™ ball, Ball Type E was a commercial grade Top-Flite® Z-Balata™ 90 golf ball, Ball Type F was a commercial grade Nike® Tour Accuracy TW™ ball, and Ball Type G was a commercial grade Titleist® Pro VI™ ball.

Coeffi...

example

A strike having a shear, tiny hairs, bad lifts and a line would be ranked as a 5 (3 points for a shear and 2 points for tiny hairs).

Note: The maximum value per strike is 6.

After completing all strikes, the average point value was determined. This average point value, or rank, can be correlated to the chart below.

RankAverage Point ValueExcellent0.0 − 1.0Very Good1.1 − 2.0Good2.1 − 3.0Fair3.1 − 4.0Borderline4.1 − 5.0Poor (unacceptable)5.1 − 6.0

Cut resistance was measured in accordance with the following procedure: A golf ball was fired at 135 feet per second against the leading edge of a pitching wedge wherein the leading edge radius was {fraction (1 / 32)} inch, the loft angle was 51 degrees, the sole radius was 2.5 inches and the bounce angle was 7 degrees.

The cut resistance of the balls tested herein was evaluated on a scale of 1 to 5. The number 1 represents a cut that extends completely through the cover to the core. A 2 represents a cut that does not extend completely through the ...

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Abstract

A golf ball comprising a core and a cover layer, wherein the cover layer provides one or more deep dimples having two or more different radii is disclosed. The deep dimples(s) extend(s) through the cover layer to and / or into a layer or component underneath. The cover may be a single layer or it may include multiple layers. The deep dual dimples may be spherical or non-spherical, and the portion of the dimple that extends to or into the next inner layer may be the same or different shape as the outer portion of the dimple.

Description

FIELD OF THE INVENTIONThe present invention relates to golf balls, and more particularly to golf balls having one or more deep dimples having two or more different radii. The deep dimple(s) extend(s) through the outer cover layer to and / or into one or more layers or components thereunder.BACKGROUND OF THE INVENTIONA number of one-piece, two-piece (a solid resilient center or core with a molded cover), and multi-layer (liquid or solid center and multiple mantle and / or cover layers) golf balls have been produced. Different types of materials and / or processing parameters have been utilized to formulate the cores, mantles, covers, etc. of these balls which dramatically alter the balls' overall characteristics.For certain applications it is desirable to produce a golf ball having a very thin cover layer. However, due to equipment limitations, it is often very difficult to mold a thin cover. Accordingly, it would be beneficial to provide a technique for producing a relatively thin outer c...

Claims

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Application Information

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Patent Type & Authority Patents(United States)
IPC IPC(8): A63B37/02A63B37/04A63B45/00A63B37/00B29C45/14B29C45/16B29C45/37B29D31/00B29C67/24B29D99/00
CPCA63B37/0004A63B37/0096A63B45/00B29C45/14065B29C45/1671B29C45/372B29D99/0042A63B37/0006A63B37/0007A63B37/0013A63B37/0016A63B37/0017A63B37/0018A63B37/0019A63B37/002A63B37/0021A63B37/0022A63B37/0024A63B37/0027A63B37/0031A63B37/0033A63B37/0037A63B37/0043A63B37/0045A63B37/0046A63B37/0074A63B37/0075A63B37/0078A63B37/008A63B37/0083A63B37/0087A63B37/0092A63B37/0095A63B37/04B29C45/1676B29C67/246B29L2031/54B29L2031/545A63B37/0052A63B37/0054A63B37/0056A63B37/00065A63B37/00215A63B37/00922
Inventor SHANNON, KEVIN J.VEILLEUX, THOMAS A.SIMONDS, VINCENT J.KENNEDY, III, THOMAS J.MELANSON, DAVID M.TZIVANIS, MICHAEL J.
Owner TOPGOLF CALLAWAY BRANDS CORP